21 witnesses observed a shooting where a man was killed and another seriously injured. They were initially questioned by the police describing the events and answering questions.
4/5 months after the event Yuille & Cutshall tracked down the witnesses and asked if they could interview them. 13 agreed to participate.
Incorporated in the questions were 2 misleading questions:
Half were asked if they saw A broken headlight whilst the other half were asked if they saw THE broken headlight. (there was no borken headlight really)
Half were asked if they saw THE yellow quarter panel and the other half A yellow quarter panel (the panel was really blue)
They also assessed participants level of stress at the time and if they had any subsequent problems like sleeplessness
A careful scoring procedure was used so comparisons could be made where qualitative accounts were turned into quantitative data. They divided information into action details and description details
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